Interactive labs, calculators & simulators
49 browser-based tools across 11 disciplines. Filter by category, difficulty, audience, or status.
Equipment Grounding Conductor (EGC) Sizing Calculator
Size equipment grounding conductors from NEC Table 250.122 — with upsizing for derated phase conductors, parallel feeder configurations, raceway-as-EGC path evaluation, and a visual EGC vs. GEC distinction diagram.
Grounding & Bonding System Visualizer
Visualize grounding and bonding current paths across service entrances, separately derived sources, generators, and UPS systems — with fault injection showing how grounding method and bonding connections control fault-current return paths.
Grounding Electrode Conductor (GEC) Sizing Calculator
Size the grounding electrode conductor from NEC Table 250.66 for service entrances and separately derived systems — with electrode-type sub-rules (250.66(A/B/C)), parallel conductor sets, material selection, and six preset configurations.